From e1a186da5cd689ca6540ed017a9b0327faaa80a6 Mon Sep 17 00:00:00 2001
From: Marc Jakobi <marc.jakobi@tiko.energy>
Date: Tue, 20 Aug 2024 11:58:43 +0200
Subject: [PATCH] chore: warn on lookup missing

---
 lua/lz/n/handler/init.lua | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lua/lz/n/handler/init.lua b/lua/lz/n/handler/init.lua
index 8113080..d177f6b 100644
--- a/lua/lz/n/handler/init.lua
+++ b/lua/lz/n/handler/init.lua
@@ -35,6 +35,30 @@ end
 ---@param handler lz.n.Handler
 ---@return boolean success
 function M.register_handler(handler)
+    if not handler.lookup then
+        vim.schedule(function()
+            vim.notify(
+                ([[
+lz.n: handler for %s does not have a 'lookup' function.
+Ignoring.
+]]):format(handler.spec_field),
+                vim.log.levels.WARN
+            )
+        end)
+        return false
+    end
+    if not handler.del then
+        vim.schedule(function()
+            vim.notify(
+                ([[
+lz.n: handler for %s does not have a 'del' function.
+Ignoring.
+]]):format(handler.spec_field),
+                vim.log.levels.WARN
+            )
+        end)
+        return false
+    end
     if handlers[handler.spec_field] == nil then
         handlers[handler.spec_field] = handler
         return true